To reduce file size for distribution, cvtemsd files are frequently compressed using LZMA, LZ4, or Gzip. However, the header itself is often uncompressed. A hex editor inspection of the first few bytes will usually reveal if the payload is raw binary or packed.
Assuming you have obtained a legitimate update file (typically a .bin, .img, or .pkg file) on a USB drive formatted to FAT32, the procedure generally follows these steps:
Warning: Do not search for random files matching this name online.
Because this is a low-level hardware identifier, searching for "cvtemsd338512m update download" can lead you to file-hosting sites with incompatible firmware.
If your TV is prompting you with upd new or displaying this string during a boot loop, here is what is happening:
If you are looking for this update to fix a broken TV, follow these steps in order: